Credit

Caption

Water footprint, conceptual image. High-speed photograph of a water drop impacting water. The impact represents the concept of a water footprint. This is an ecological concept simillar to that of a carbon footprint. It is a measure of the demand (in volume) that a product or service has on freshwater resources. It may also be applied to the person or population that consumes those goods and services. The demand is represented as three colours. Green is the water lost due to evaporation from soil, blue is the groundwater depleted and grey/white is the water that is polluted as a result of the production of a good or service.